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2 How to Use This Guide Read this Guide completely as you install and start up your new AK-SC 255 controller. Scope of document The intended scope of the On-Site Installation Guide is to provide guidance on how to mount, power and apply initial system settings. The goal of this guide is to ready the AK-SC255 for the commissioning phase, where more detailed documentation is available. Further recommended reading The following documentation is designed to provide further reading for commissioning and system setup, and is available via the following Danfoss web sites: AK-SC255 REFERENCE MANUAL (RS.8D.M1.22) AK-SC255 R SUPPLEMENT MANUAL (DKRCE.ES.R1) AK-SC255 E SUPPLEMENT MANUAL (DKRCE.EC.R1) What s Needed for Installation What you will need to finish the installation: 1. A screwdriver 2. A drill and fasteners appropriate to mounting the controller. 3. A dedicated 120V a.c. or 230V a.c. circuit (the unit is fused internally at 1.0 Amp) 4. OEM installations require a dedicated disconnect Wire and Cable Requirements AK-SC255 Power: ~100 to 240V a.c. 50/60Hz (Use approved local wiring codes of practice) AK-SC255D (DIN) 24V d.c. Communications: Ethernet Approved Cat5 cable Host 18-22AWG, Beldon or equivalent (or approved Cat5 if Ethernet is used as Host) I/O network 18-22AWG, Beldon or equivalent (Twisted pair stranded wire with shield) A Note about Code Compliance Danfoss believes that no instruction in this guide violates any national or local electrical code, but the installer is responsible for compliance with any code applicable to the installation site. Use the installation drawing as reference. WARNING: To avoid risk of injury from electric shock, ensure correct electrical isolation is made before working within the enclosure. 2 WARNING - The AK-SC255 contains a 3 V battery (type CR2032) to maintain programmed settings. Do not recharge, disassemble or dispose of in fire. Danger of burn or explosion may occur if mistreated, follow local regulations for correct disposal. Replacement battery is available from typical battery stockists.

5 Connector Board - User Connections Internal component layout cont. Connector board The Connector board contains the main user connection ports needed for communications, relay output and power supply: Ethernet Standard RJ45 Ethernet port, used for TCP/IP remote connection (LAN,WAN), SNMP network support & Host network. Use Ethernet as Host network if Virtual Display functionality is required. Ethernet External Modem Port Output relay RS485 /Modbus Lonworks Communication Power Supply RS485 Host network / Modbus Use the RS485 port either for RS485 Host or EKC Mod bus communications. For RS485 Host communica tions, use 2 conductor shield cable. Up to 10 AK-SC 255 controllers can be connected in a host network. Host / Modbus network options JP3 & JP4 Notes RS485 Host OFF (factory set) Used when combining AKC55 / 255 on host 120 Ohm terminator to be on 1st & last unit EKC Modbus ON Use for EKC Modbus controllers 120 Ohm terminator to be on last controller only If host network required use Ethernet Ethernet Host N/A Use Ethernet port and connect to LAN Configure in Communications section Lonworks I/O Network (TP78, RS485, FTT10 options available) Depending on protocol type, the number of network ports will differ External Modem Modem port used in conjunction with Modem Adapter kit 080Z2100 Relay Rated at 30V d.c. 1Amp. Used for external alarm signal. AK-I/O Modules.. AK-I/O Modules Terminator Terminator Generic Controller devices AK & EKC controllers Lonworks I/O Network The I/O (Input-Output) network uses Echelon Lon Talk communications. Depending on AK-SC255 version, up to five I/O network cables can be connected to each AK-SC 255. When connecting A and B conductors, there is no polarity to observe for AK I/O modules. For more information about connecting I/O cables, and restrictions on their length and layout, consult the AK-SC255 Reference Manual. Attach a terminator to each set of unused I/O terminals. For Generic networks (EKC & AK controllers) it is recommended only to use one of the five ports available. Follow network wiring regulations for each of the different network types. For additional in formation on networks consult Danfoss document entitled Data communication between ADAP-KOOL Refrigeration Controls (RC8AC302) 5

6 L N G Making connections to the controller Conduit entrances are located both on the bottom of the controller and at the back. Five, 7/8 (22 mm) conduit access ports are available at the bottom. Located at the rear, there are three 1 1/8 (28 mm) ports with an additional 7/8 (22 mm) port. Make sure any I/O network and communication runs are kept separate from the mains power. G N L Power Supply ~100 to 240 V a.c. 50/60 Hz Direct connect (side port) using Danfoss cable 080Z0262 Power connection The AK-SC255 has an auto sensing power supply and is intended for voltage ranges V a.c. 50/60 Hz. An onboard fuse rated at 1 Amp protects the internal electronics. Ensure the same type / rating fuse is used if required. The AK-SC255D (DIN) mount should be powered with a 24 V d.c. supply. Danfoss recommends the AK-PS DIN mount 24V d.c. power supplies: AK-PS 250 (080Z0055) 24 V d.c. 2.5A 60 VA AK-PS 075 (080Z0053) 24 V d.c. 0.75A 18 VA AKA 65 Software Local connection A local connection to a PC can be established using either Ethernet or via the RS232 direct connect port (located at the right hand side of the AK-SC 255 or the RS232 port on the DIN AK-SC255 model). For local connection via RS232 use Danfoss cable part # 080Z0262. AK-SC255D (DIN Mount version) External connection by dial-up modem When using a modem to connect / dial out alarms, it is recommended that the modem adapter kit (080Z2100) is used. From the Main Menu select Communications. Goto Modem Config. Answer the system question yes to Configure modem on this unit: Next, use the drop down list (see screen shot opposite) to select your modem type. Ensure all other parameters are set (Baud rate, line type, Data & stop bit and parity). Typically these values can be left as factory standard. The final setting, Disconnect method refers to the way the modem is disconnected after use. Use the Power down option if a modem adapter is being used. This will toggle the adapter and ensure a clean power re-set. 6 Modem Config page (choose modem type)

7 Initial AK-SC255 configuration To get the AK-SC255 ready for full commissioning, a few steps should be implemented. The following section covers the typical settings required for commissioning preparation. Main Menu - Icon Overview Factory authorization code: (enter) 50 (enter) Authorization Menu Authorization After a successful boot up the AK-SC 255 will display the Main Menu. Move the cursor, using the arrow keys, to the menu item Authorization and press the ENTER KEY. On the Authorization screen, the cursor is on a field called Auth. Below that is a field called Account. Your first operation, each time you use the controller, will be to enter your authorization code and account number. These will be given to you by the system owner. The default authorization code from the Danfoss factory is 12345, and the default account code is 50. Once the correct supervisor code has been entered the screen will change and reflect supervisor (assuming the factory code is valid and has not been replaced). Store Info The Store Info icon contains various settings that reflect language, preferences, opening hours and other configuration parameters. See the following page for an overview of the main areas - configure as required. 7

12 ADAP-KOOL Refrigeration Control Systems is a trademark of Danfoss A/S, Danfoss Inc., Refrigeration & Air-Conditioning Division, 7941 Corporate Drive, Baltimore, MD Tel , Fax , Danfoss can accept no responsibility for possible errors in catalogs, brochures, or other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved. 12 AK-SC255 Installation Guide USCO.PI.R1.A1.22/ 521U0073 Danfoss

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